Rocker BRET MICHAELS has cancelled a string of shows as he recovers from surgery.The Poison singer was released from hospital on Monday (12Apr10) after undergoing an emergency appendectomy in San Antonio, Texas - but he's far from well enough to return to the stage. Michaels scrapped a show in Baton Rouge, Louisiana on Wednesday (14Apr10) and has now postponed six upcoming concerts. A post on his website reads, "Bret remains under medical supervision at an undisclosed private care facility specializing in the rehabilitation of diabetic patients. "While the surgery went well and doctors are optimistic that the rocker will make a full recovery, the fact that he was exhausted due to his rigorous schedule prior to the surgery and coupled with the fact that he has diabetes, the surgery has taken its toll. "Even for non-diabetic patients, the recovery from surgery can be long and painful. Doctors were amazed at how good of health Bret was in (sic) being a 47-year-old diabetic. However, the main focus and concern right now is that he is able to rest, recover and maintain good blood sugar levels while doing so."